Evaporating-pan



(No Model.) A. E. WARNER. EVAPORATING PAN.

No. 506,752. Patented 0013. 17, 1893.

M. I" I "NIL mun 7 arranged the one outside of the other.

UNITED STATES PATENT OFFICE.

ALFRED E. WVARNER, OF BENNETTS CORNERS, OHIO.

EVAPORATlNG-PAN.

SPECIFICATION forming part of Letters Patent No. 506,752, dated October 17, 1893.

Application filed May 15, 1893- Serial No. 474,308. (No model.)

To all whom it may concern.-

Be it known that I, ALFRED E. WARNER, of Bennetts Corners, in the county of Medina and State of Ohio, have invented certain new and useful Improvements in Steam-Evaporators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in steam-evaporators more especially designed for the manufacture of maple sugar and sirup from sap, but it is well adapted for evaporating all kinds of juices that require evaporation.

My invention consists in certain features of construction and in combinations of parts hereinafter described and pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of an evaporating apparatus embodying my invention, a portion being broken away to reduce the size of the figure. Fig. 2 is a 'top plan in horizontal section on line 22,'Fig. 1. Figs. 3 and 4 are vertical sections on lines 33, and 4=4, respectively, Figs. 1 and 2.

Referring to the drawings, A represents the evaporating tank or vat of my improved apparatus. Said tank or vat is divided into two helical compartments or channels A A Said compartments, at their inner ends, are in open relation with'each other, as at a. (See Fig. 2.)

B represents two steam-pipes that, at the outer end of channel or compartment A, connect with steam-supply-pipe B, and thence lead lengthwise through said channel or compartment into the inner end of the outer channel or compartment A and thence extend lengthwise through the outer compartment or channel A to near the outer end of said channel or compartment, and thence lead laterally through said channel or compartment, as at b, into a heater 0, and, after making several convolutions within said heater, extend outwardly through the heater, as at b. The

channels or compartments A A of the tank low as compared with the depth of the channels or compartments of the evaporating tank or vat.

D represents a pipe for conveying the juices to be evaporated from the storage-tank or reservoir (not shown) containing said juices into heater 0, and E represents a pipe for conducting the heated juices from heater 0 to the outer channel or compartment A of the evaporating tank or vat. Steam-pipes B receive the steam at the outer end of the inner channel or compartment, as already indicated, and the steam exhausts at 1) between the outer end of the outer evaporating channel or compartment and the heater, at which exhaust point steam-pipes B are provided, respectively, with a valve or cook, B that,

during the operation of the apparatus, is

the inner end of the same, whence it flows into the inner channel or compartment A and returns through said inner channel or through a hole a in the outer end wall of said channel or compartment into a small compartment A provided just ouside the outer end of channel A. It will be observed that the steam-pipes do not extend into compartment A and hence the juice does not boil within said compartment. Compartment A is open at the top and the operator has, therefore, an opportunity to see when the juice has been sufficiently evaporated. The outer side-wall of compartment A consists, wholly or partially, of a slide a When, therefore, the juice has been sufficiently evaporated the operator lifts or elevates slide a thereby permitting the juice to escape through the opening thus formed under the slide into areceptacle (not shown) designed to receive the evaporated juice.

that it will come flush with or below the bot- 7 tom of said opening. By the construction just described, it will be observed that because the steam-pipes are hotter at the outer portion of channel A than in the outer por-. tion of compartment or channel A the juice will boil harder within compartment or channel A than within channel or compartmentv A and consequently any scum forming on: top of the juice will be driven back through the outer channel or compartment, and through opening a into the perforated pail; in compartment A and any clean and pure. juice mixed with the scum will be drained? from said pail and drop into the lower por-i tion of compartment A below said pail whence the juice thus drained will pass through opening a back into channel or compartment A E The dirt and scum are thus all received by pail G, and the compartment containing said pail g is properly called the scum-compartment. The pail having filled with the dirt and scum I thus skimmed from the evaporated juice, it is removed, emptied of its contents and replaced within the scum-compartment.

H represents the cover of the tank or vat of my improved apparatus. Said cover has preferably a conical shape and is of such contour as to nicely cover compartments A and A and a portion of the scum-compartment, being provided with a depending rim it that extends all round the outer or lower edge of the cover, and nicely fits over the tank or vat, thereby excluding dust, dirt, &c. To accommodate the introduction and removal of perforated pail G, cover H is provided with a hinged lid H at that portion that covers a part of compartment A of cover H of course forms a chamber above compartments A A and cover H at the central portion is perforated to establish open communication between said chamber and a stack K that is adapted to carry off the steam arising from the evaporation.

By the construction thus far described, it will be observed that an artificial draft is created from the scum-compartment a portion whereof is open at the top, through channels A'A chamber under cover H and stack K, thereby facilitating the removal or escape of the steam arising from the evaporation. Stack K is preferably composed of two sections It adapted the former to telescope over the latter. The upper section of the stack is rigidly supported in any suitable manner from the roof I of the building in which The conical shape soeyrsz the apparatus is located, and the lower section of the stack is rigidly secured in any suitable manner to cover H of the tank or vat of the apparatus. The upper end of cover H extends, however, a suitable distance into the lower end of the stack to thereby form a trough or gutter L just inside the lower end of the stack. Said trough or gutter being adapted to catch or receive any drip that may trickle or flow adown the inner side of the stack, and 1 represents a pipe for conducting off the drip caught or received by said trough or gutter. The upper section it of the stack, at some suitable point, is provided with two pulleys, M, located preferably at diametrically opposite points of the stack.

N represents cords that are secured to the lower section 7c of the stack in any suitable manner, for instance, as shown, by means of hooks n, said cords leading from said hooks over pulleys M and having attached,at their opposite ends, weights 0 that are adapted to counterbalance the weight of cover H and the attached lower portion is of the stack. By the construction just described, cover H, by lowering weights 0, is elevated from the tank or vat of the apparatus, as required, for the purpose of cleaning the tank, making repairs, &c., cover H being held at the desired elevation or counterbalanced by means of said weights.

What I claim is--- l. Evaporatingapparatuscomprisingatank having two helical channels or compartments arranged the one outside of the other and in 3 open relation with each other at their inner ends, one or more steam-pipes leading from the outer end of the inner channel or compartment lengthwise of said channel or compartment into the outer channel or compartment and thence leading lengthwise through said outer channel or compartment, a heater, a pipe for conveying the juice to be heated to said heater, and a pipe for conveying the heated juice from said heater into the outer channel or compartment, the outer end of the inner channel or compartment being provided zvitlia discharge-opening, substantially as set ort V r 2. Evaporatingapparatus comprisingatank having two helical compartments arranged the one outside of the other and in open relation with each other at their innerends, one or more steam-pipes extending lengthwise of said compartments or channel from the outer portion of the one compartment or channel to the outer portion of the other compartment or channel, the channel or compartment having the hottest portion of said steam-pipe or pipes being provided at its outer end and at or near the bottom with adischarge-opening, suitable means for conveying the heated juice into the outer portion of the evaporating'channel or compartment from which said steampipe or pipes lead and a scum-compartment at the outer end .of said evaporating channel' within said scum-compartment and openings establishing open relation between the top and bottom of said scum compartment and contiguous evaporating-channel or compartment, substantially as and for the purpose set forth.

3. Evaporating apparatus comprising two helical evaporating channels or compartments arranged the one outside of the other, and inpartment having the lowest temperature, and

a scum-compartment located at the outer end of said evaporating-channel or compartment, a pail or container, having a perforated bottom, suitably supported centrally of the scumcompartment, and the latter, above and below said pail or container, being in open relation with the contiguous evaporating-conipartment or channel, substantially as and for the purpose set forth.

4. Evaporating apparatus comprising two helicalevaporating-channels orcompartments arranged in open relation with each other,

substantially as indicated, one or more steampipes leading lengthwise through said channels or compartments from the outer end of the one channel or compartment to the outer end of the other channel or compartment, suitable means for conveying the juice to be treated to the outer portion of the one evaporating-channel or compartment, a dischargeopening at or near the bottom of the outer portion of the other evaporating channel or compartment, and a compartment, for inspecting purposes, adapted to receive the dis charge from said discharge-opening and provided with 'a slide, a substantially as and for the purpose set forth. 5. In evaporating apparatus, the combination of the evaporating-tank, cover for said tank and stack for the escape of the steam generated in the evaporating process, said stack being composed of two sections adapted to telescope the one within the other, suitable means for supporting the upper section of the stack, the lower section of the stack being rigid with the aforesaid cover, said cover being adapted to be elevated from the evaporating tank, and suitable means for counterbalancing the weight of said cover when elevated, substantially as set forth.

In testimony whereof Isign this specification, in the presence of two witnesses, this 18th day of April, 1893.

ALFRED E. WARNER.

Witnesses:

G. H. Donna, WARD. HOOVER. 

